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Problem Display

PID: 149729 (1B3K2/5Rpp/1P1pp1p1/1P2kp1N/bb6/4PBN1/pp5P/q1n4Q w - - 0 1)

Ott, Hans

Schweizerische Schachzeitung, 1921

1B3K2/5Rpp/1P1pp1p1/1P2kp1N/bb6/4PBN1/pp5P/q1n4Q

#4

11 + 13

15158	Hans Ott Schachprobleme (Kummer)	1986

SOLUTION

SOUND
Keys
- 1.Ba8!
  - threat
    - 2.Qd5+
      - 2...exd5
        3.Re7#
  - 1...gxh5
    - 2.Rxf5+
      - 2...exf5
        3.Qd5+
        3...Kf6
        4.Qxf5#
    - 2.Qf3
      - threat
        3.Qf4#
      - 2...Se2
        3.Rxf5+
        3...exf5
        4.Qxf5#
      - 2...Sd3
        3.Rxf5+
        3...exf5
        4.Qxf5#
      - 2...g5
        3.Rxf5+
        3...exf5
        4.Qxf5#
        3.Sxf5
        threat
        4.Qe4#
        4.Qg3#
        3...exf5
        4.Qd5#
        4.Qxf5#
    - 2.Qf1
      - threat
        3.Qf4#
      - 2...Se2
        3.Rxf5+
        3...exf5
        4.Qxf5#
      - 2...Sd3
        3.Rxf5+
        3...exf5
        4.Qxf5#
      - 2...g5
        3.Rxf5+
        3...exf5
        4.Qxf5#
  - 1...Bb3
    - 2.Ra7
      - threat
        3.Qb7
        threat
        4.Qxg7#
      - 2...gxh5
        3.Qb7
        threat
        4.Qxg7#
        3...Kf6
        4.Qxg7#
        3...g5
        4.Qg7#
        3...g6
        4.Qg7#
      - 2...Bd5
        3.Qxd5+
        3...exd5
        4.Re7#
      - 2...g5
        3.Qb7
        threat
        4.Qxg7#
        3...g6
        4.Qg7#

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